Comment by Lyrex

In my opinion this doesn't fall under the "it's only on my LAN and a super small project" category. If you LAN is a company then you should be able to deploy a custom CA to your clients and sign your certs. If it's only your small side project you personally work on, then just trusting the cert locally works out too. If people don't want to use third party providers, they have to do some of the work on their own. That's nothing new (at least to me).